/**
 * @author (Jeff Thomas) 
 * @version (09.13.2007)
 */

import java.util.*;

public class Grading
{
    public static void main(String[] args) {
        System.out.println(grade(75));
    }
    
    public static double grade(int a) {
        if (a <= 60) {
            return 0.0;
        }
        else {
        double gpa = (a - 60) * 0.1;
        return gpa;
        }
    }
}